SET OF TWO SERVICE BRAKE CHAMBERSThese items aregovernment surplus. Appear to be new/never used, however has been stored for extended periods of time. All sales are final on this item.Possible make would bea Midland MA36160. Please do your product research before purchasing. I cannot find a better model number on this item.The only numberidentifying thisset of chambers is Type 20. One chamber has parts intact in asmall plastic bag-the other does not. One chamber has bolts attached-the other does not. See pictures for actual items being sold in this product.Combined shipping is available-please see our other products.We have had continued positive feedback on the truck parts that we have been offering for sale. These surplus items have been excellent quality. Please see our feedback regarding these parts and purchase with confidence.As of 03/16/2011 we do accept checks from government entities and businesses. If you do not have a paypal account we will work with your agency or company. Contact us for more details. On Jan-08-13 at 09:44:00 PST, seller added the following information:FREE! Sellers: Add a FREE map to your listings. FREE!